A self-elevating monolith platform

Abstract

This application discloses a self-elevating rock-embedded platform, comprising: a hull platform with multiple pile-planting positions; lifting legs mounted on the hull platform and capable of lifting to drive the hull platform to switch between a relocation state and a construction state; a rock-embedded drilling rig mounted on the hull platform for rock-embedded construction at the pile-planting positions; and hoisting equipment mounted on the hull platform. This application reduces the relocation time from one or even two days to one or two hours, significantly increasing platform relocation efficiency. Since the rock-embedded drilling rig does not need to be disassembled during platform relocation, the safety and reliability of the relocation are higher. During platform relocation, there is no need for a large floating crane vessel for relocation construction, which is the most expensive construction machinery in rock-embedded construction; this solution will significantly reduce the cost of rock-embedded construction. The floating hull platform, compared to the prior art which requires disassembling the crane, significantly improves safety and boundary conditions.

Description

Technical Field

[0001] This application relates to the field of offshore wind power technology, and more specifically, to a self-elevating rock-embedded platform. Background Technology

[0002] Offshore wind power refers to the technology of generating electricity using offshore wind resources, converting wind energy into electrical energy through wind turbines installed in the ocean. Compared to onshore wind power, offshore wind power has advantages such as abundant wind energy resources, high stability, and land saving. Although offshore wind power started later, it is developing rapidly due to the continuous stability of offshore wind resources and its high power generation capacity.

[0003] When installing offshore wind power systems, rock-embedded construction is required in the marine environment to allow the insertion of steel pipe piles. A jacket foundation is then installed on these piles to support the wind turbine generators. The traditional method for rock-embedded construction involves erecting a rock-embedded platform. This platform is a fixed offshore structure that provides stable support for rock-embedded equipment such as rock-embedded drilling rigs. Because rock-embedded platforms need to withstand sea states of force 8 and survive in sea states of force 10 or higher during the construction phase, their structure is relatively heavy.

[0004] After completing the rock-embedded construction at the current location, the rock-embedded platform needs to be moved to the next location. A normal rock-embedded platform weighs approximately 1000-1500 tons, and considering the equipment on the platform weighs approximately 500-800 tons, a floating crane vessel of at least 2500 tons is required to carry out the lifting work during the relocation of the rock-embedded platform. In the rock-embedded construction process, besides lifting the rock-embedded platform, the largest lifting loads are the casing and steel pipe piles. This means that it would be very wasteful to have a floating crane vessel of at least 2500 tons waiting next to the rock-embedded platform location for 1-2 months (rock-embedded construction takes a long time) just for the relocation of the rock-embedded platform.

[0005] In the prior art, in order to reduce the lifting weight, the rock-embedded platform is divided into multiple modules to reduce the lifting weight during relocation. However, this reduces the relocation efficiency and requires additional transport ships to store the rock-embedded platform modules.

[0006] Therefore, how to facilitate the relocation of rock-embedded platforms and improve relocation efficiency is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] In view of this, the purpose of this application is to provide a self-elevating rock-embedded platform to facilitate the relocation of the rock-embedded platform and improve the relocation efficiency.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] The first aspect of this application provides a self-elevating rock-embedded platform, comprising:

[0010] The hull platform is equipped with multiple pile-planting stations;

[0011] The lifting legs are installed on the hull platform and can perform lifting and lowering actions to drive the hull platform to switch between a displacement state and a construction state. When the hull platform is in the displacement state, it floats on the water. When the hull platform is in the construction state, it is located on the upper side of the water.

[0012] A rock-embedded drilling rig is installed on the hull platform and is used for rock-embedded construction at the pile planting site.

[0013] The hoisting equipment is installed on the hull platform.

[0014] In one possible implementation, the number of pile driving positions is at least three, and the number of piles is the same as the number of the jacket foundation to be constructed.

[0015] The positional relationship of each of the aforementioned pile planting positions is the same as the positional relationship of each pile foundation of the jacket foundation to be constructed.

[0016] In one possible implementation, one of the pile-planting stations is directly located on the hull platform, while the other pile-planting stations are located on the side of the hull platform via support devices.

[0017] or,

[0018] Each of the aforementioned pile-planting stations is directly set on the ship's hull platform.

[0019] In one possible implementation, each of the pile planting stations is equipped with a corresponding rock-embedded drilling rig.

[0020] In one possible implementation, each of the pile-planting stations is provided with a drill bit placement area and a counterweight placement area.

[0021] The drill bit placement area is used to place the drill bits used by the rock-embedded drilling rig;

[0022] The counterweight placement area is used to place counterweight devices of various weight specifications. The counterweight devices are used to apply pressure to the rock-embedded drilling rig during rock-embedded construction.

[0023] In one possible implementation, each of the pile planting stations is provided with a corresponding drill rod placement area;

[0024] The drill rod placement area is used to place the drill rod device used by the rock-embedded drilling rig.

[0025] In one possible implementation, the drill rod devices placed in each of the drill rod placement areas include at least two different length specifications of weighted drill rods;

[0026] The drill pipe devices placed in each of the drill pipe placement areas also include drill pipes of at least one length specification.

[0027] In one possible implementation, each of the pile-planting stations is provided with:

[0028] An air compressor is used to inject compressed air into the borehole through the drill rod assembly of the rock-embedded drilling rig, so as to discharge mud and rock cuttings through the drill rod assembly;

[0029] Settling tanks are used to store mud and rock cuttings discharged from drill pipe equipment.

[0030] In one possible implementation, each of the pile-planting stations is equipped with a generator to power the air compressor and a fuel storage tank for storing fuel for the generator.

[0031] In one possible implementation, the lifting equipment includes a main crane and an auxiliary crane, wherein the lifting weight of the main crane is greater than that of the auxiliary crane.

[0032] The self-elevating rock-socketing platform provided in this application comprises a hull platform equipped with lifting legs. These lifting legs enable the hull platform to switch between a displacement state and a construction state. In the displacement state, the hull platform can float on the water, facilitating its towing to the target location via its own drive system or an external tugboat. In the construction state, the lifting legs descend, raising the hull platform to the upper waterline to improve its stability and prevent damage from waves. The hull platform has multiple pile-planting positions, from which casings and steel pipe piles can be hoisted to corresponding positions on the seabed using lifting equipment. Rock-socketing drilling rigs can also be inserted into the seabed through these positions to perform rock-socketing construction at the corresponding locations.

[0033] This application can improve construction relocation efficiency, reducing the relocation time from one or even two days to one or two hours, significantly increasing platform relocation efficiency. Since the rock-embedded drilling rig does not need to be disassembled during platform relocation, the safety and reliability of the relocation are significantly improved. During platform relocation, there is no need for a large floating crane vessel, which is the most expensive construction machinery in rock-embedded construction; this solution will significantly reduce the cost of rock-embedded construction. The floating platform hull, compared to the existing technology that requires disassembling the crane, significantly improves safety and boundary conditions. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the self-elevating rock-embedded platform disclosed in the embodiments of this application;

[0036] Figure 2 This is a top view of the self-elevating rock-embedded platform disclosed in the embodiments of this application;

[0037] Figure 3 This is a top view of the deck of the self-elevating rock-embedded platform disclosed in the embodiments of this application;

[0038] Figure 4 This is a structural schematic diagram of the floating state of the self-elevating rock-embedded platform disclosed in the embodiments of this application;

[0039] Figure 5 This is a schematic diagram of the structure of the self-elevating rock-embedded platform disclosed in the embodiments of this application after it has been self-elevated;

[0040] Figure 6 This is a schematic diagram of the self-elevating rock-embedded platform disclosed in the embodiments of this application during casing installation;

[0041] Figure 7 This is a schematic diagram of the structure of the self-elevating rock-embedded platform disclosed in the embodiments of this application after the casing is inserted into the pile planting position;

[0042] Figure 8 This is a schematic diagram of the structure of the self-elevating rock-embedded platform disclosed in the embodiments of this application during casing vibration;

[0043] Figure 9 This is a schematic diagram of the structure of the self-elevating rock-embedded platform disclosed in the embodiments of this application during rock-embedded drilling;

[0044] Figure 10 This is a schematic diagram of the structure of the self-elevating rock-embedded platform disclosed in the embodiments of this application after steel pipe piles have been implanted;

[0045] Figure 11 This is a schematic diagram of the structure of the self-elevating rock-embedded platform disclosed in the embodiments of this application after grouting.

[0046] The meanings of the various reference numerals in the figure are as follows:

[0047] 100-Hull platform; 101-Drill bit placement area; 102-Counterweight placement area; 103-Drill pipe placement area; 104-Settling tank; 105-Pile driving station; 106-Air compressor; 107-Generator; 108-Fuel storage tank;

[0048] 200-Main crane;

[0049] 300-Rising Pile Legs;

[0050] 400-Rock-Embedded Drilling Rig;

[0051] 500-Auxiliary crane;

[0052] 600 - casing;

[0053] 700-Vibratory Hammer;

[0054] 800-Rock-embedded hole;

[0055] 900-Steel pipe pile. Detailed Implementation

[0056] The core of this application is to provide a self-elevating rock-embedded platform to facilitate the relocation of the rock-embedded platform and improve the relocation efficiency.

[0057] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the application as described in the claims. Additionally, the complete composition represented in the embodiments below is not limited to what is necessary as the solution to the application described in the claims. It should be noted that, for ease of description, only the parts relevant to the application are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0058] like Figures 1-3 As shown in the embodiments of this application, the self-elevating rock-embedded platform disclosed includes a hull platform 100, lifting legs 300, a rock-embedded drilling rig 400, and hoisting equipment.

[0059] The hull platform 100 is equipped with multiple pile-planting positions 105, which allow the casing, steel pipe piles, and drill rods and drill bits of the rock-socketed drilling rig 400 to pass through and extend into the water bottom (seabed, lake bottom). Sleeves can be installed at the pile-planting positions 105 to facilitate the insertion of drill rods and drill bits, as well as the insertion of casings and steel pipe piles. The hull platform 100 may be equipped with a power system, enabling it to move autonomously, or it may be towed by external towing vessels without a power system. This application embodiment does not limit whether the hull platform 100 needs to be equipped with a power system.

[0060] The lifting legs 300 are mounted on the hull platform 100 and are capable of lifting and lowering to drive the hull platform 100 to switch between a displacement state and a construction state. The lifting legs 300 can be driven to lift and lower via a motor and a rack and pinion mechanism, or via a hydraulic system. This embodiment does not limit the type of lifting and lowering drive for the lifting legs 300.

[0061] Typically, four lifting legs 300 are installed and evenly distributed around the center of gravity of the hull platform 100. This ensures the stability of the hull platform 100 when it is supported by the lifting legs 300, preventing it from collapsing due to eccentricity.

[0062] When the platform 100 is in a displaced state, it floats on the water. That is, when the lifting legs 300 rise to the top of the seabed, they lose their supporting force. The platform 100 utilizes its own buoyancy to float on the water, allowing it to move. The platform 100 can be equipped with a propulsion system to drive its movement. Alternatively, the platform 100 can be moved to its designated position easily using external equipment such as tugboats.

[0063] It should be noted that, considering support costs, even if the hull platform 100 is equipped with its own propulsion system, it may not need to be equipped with a propulsion system capable of long-distance navigation. That is, its configured propulsion system is sufficient to drive the hull platform 100 at a relatively slow speed over short distances; for long-distance navigation, it can be towed by tugboats.

[0064] When the hull platform 100 is under construction, it is located on the upper side of the water body. That is, when the lifting legs 300 are lowered to support the seabed, the hull platform 100 can be lifted to the upper side of the water body by the lifting legs 300, so as to ensure that the hull platform 100 is not affected by the waves of the water body, improve the stability of the hull platform 100, and facilitate rock embedding construction.

[0065] The rock-socketing drilling rig 400 is mounted on the ship platform 100 and is used for rock-socketing construction at the pile planting position 105. The hoisting equipment is mounted on the ship platform 100 and can be used to hoist the devices required during the construction process, such as casings, steel pipe piles, vibratory hammer 700, rock-socketing drilling rig 400, etc.

[0066] The lifting equipment may include a main crane 200 and an auxiliary crane 500, with the main crane 200 having a greater lifting capacity than the auxiliary crane 500. That is, the self-elevating rock-embedded platform disclosed in this embodiment can be configured with two cranes, allowing selection of the appropriate crane (main crane 200 and auxiliary crane 500) based on the lifting weight, thereby reducing lifting costs and preventing high costs associated with using the main crane 200 when lifting lighter equipment. It should be noted that the self-elevating rock-embedded platform may also be configured with only one crane, i.e., only the main crane 200; this embodiment does not limit the number of cranes.

[0067] In summary, the self-elevating rock-embedded platform disclosed in this application includes a hull platform 100, which is equipped with lifting legs 300. The lifting legs 300 can drive the hull platform 100 to switch between a displacement state and a construction state. When the hull platform 100 is in the displacement state, it can float on the water to facilitate movement to the target location. When the hull platform 100 is in the construction state, the lifting legs 300 descend, raising the hull platform 100 to the upper side of the water to improve the stability of the hull platform 100 and prevent it from being affected by waves. The hull platform 100 is provided with multiple pile-planting positions 105, from which the casing and steel pipe piles can be hoisted to the corresponding positions on the seabed using hoisting equipment. The rock-embedded drilling rig 400 can also be inserted into the seabed through the pile-planting positions 105 to carry out rock-embedded construction at the corresponding positions.

[0068] This application can improve construction relocation efficiency, reducing the relocation time from one or even two days to one or two hours, significantly increasing platform relocation efficiency. Since the rock-embedded drilling rig 400 does not need to be disassembled during platform relocation, the safety and reliability of the relocation are significantly improved. During platform relocation, there is no need for a large floating crane vessel, which is the most expensive construction machinery in rock-embedded construction; this solution will significantly reduce the cost of rock-embedded construction. The platform hull 100 is made floating, which, compared to existing technologies that require disassembling the crane, significantly improves safety and boundary conditions.

[0069] Currently, jacket foundations typically include three or four piles. Therefore, the self-elevating rock-embedded platform disclosed in this embodiment can have at least three pile-planting stations 105, the same number as the number of piles in the jacket foundation to be constructed. The positional relationship of each pile-planting station 105 is the same as the positional relationship of each pile in the jacket foundation to be constructed. That is, the distance between any two adjacent pile-planting stations 105 is the same as the distance between the corresponding two adjacent piles in the jacket foundation. With this arrangement, rock-embedded construction can be carried out simultaneously at multiple pile-planting stations 105, thus completing the construction of multiple piles at the same time and improving construction efficiency.

[0070] Taking three pile-planting positions 105 as an example, casings can be inserted into two of the positions 105 first. Since the casings, once hoisted to the seabed, rely solely on their own weight, the insertion depth is limited and stability cannot be maintained. A vibratory hammer 700 or hydraulic hammer is needed to increase the insertion depth. At this point, the vibratory hammer 700 or hydraulic hammer can be hoisted to the top of one of the casings, and the vibration of the vibratory hammer 700 or hydraulic hammer gradually increases the insertion depth of that casing. During the operation of the vibratory hammer 700 or hydraulic hammer, the casing is then inserted into the third pile-planting position 105. That is, when the casing is inserted at the third pile-planting position 105, two construction sites are being worked on simultaneously, improving construction efficiency. Different construction methods can be performed at different pile-planting positions 105 subsequently. For example, one pile-planting position 105 can be used for rock-embedded drilling, another pile-planting position 105 that has completed rock-embedded drilling can be used for steel pipe pile installation, and the pile-planting position 105 that has completed steel pipe pile installation can be used for grouting, etc.

[0071] It should be noted that the above-described construction process sequence is merely an example. Those skilled in the art can choose the construction sequence for each pile-planting station 105 according to their needs. The key point of this application embodiment is that, by setting up multiple pile-planting stations 105, construction can be carried out at each pile-planting station 105 during rock-socketing construction, that is, construction can be carried out at multiple pile-planting stations 105 simultaneously. Each pile-planting station 105 can perform the same step or different steps, which can be selected by those skilled in the art. This application embodiment does not limit the construction sequence.

[0072] Those skilled in the art will understand that when the three pile-planting stations 105 are carrying out different steps of construction, the construction equipment used is different, so there is no waiting due to sharing construction equipment, and thus it can be ensured that the three pile-planting stations 105 can carry out different steps of construction at the same time.

[0073] In one specific embodiment of this application, one of the pile-planting positions 105 is directly set on the hull platform 100. Since the pile-planting position 105 needs to ensure that the steel pipe piles, casings, drill bits, etc., are inserted into the seabed, if the pile-planting position 105 is set on the hull platform 100, it needs to penetrate the hull platform 100. Once the pile-planting position 105 is set on the hull platform 100, its position cannot be changed. Those skilled in the art will understand that jacket foundations are not of uniform size; that is, the distance between the piles of different jacket foundations may vary. Therefore, if all the pile-planting positions 105 are set on the hull platform 100, the self-elevating rock-embedded platform will only be suitable for jacket foundations of one size, unless construction efficiency is disregarded and only one pile-planting position 105 is used for construction, without considering the simultaneous construction of multiple pile-planting positions 105.

[0074] In this embodiment, only one pile-planting station 105 is directly set on the hull platform 100, while the other pile-planting stations 105 are set on the side of the hull platform 100 through support devices. Figure 2 As shown, Figure 2 In the illustrated scheme, there are three pile planting stations 105. One pile planting station 105 is directly installed on the hull platform 100, and the other two pile planting stations 105 are installed on the side of the hull platform 100 through support devices.

[0075] When the positional relationship of each pile planting station 105 of the self-elevating rock-embedded platform is different from the positional relationship of the pile foundation of the jacket foundation to be constructed, the support device and the pile planting station 105 on the support device can be removed. Then, according to the positional relationship of each pile foundation of the jacket foundation, the support device can be reinstalled in the corresponding position so that the positional relationship of each pile planting station 105 is the same as the positional relationship of the pile foundation to be constructed.

[0076] The support device for supporting the pile planting station 105 can be designed as a detachable structure to facilitate adjustment of the position of the pile planting station 105 according to the positional relationship of the piles in the jacket foundation. Alternatively, the support device for supporting the pile planting station 105 can be welded to the side of the hull platform 100. When the position of the pile planting station 105 needs to be adjusted, the support device can be cut off and a new support device can be welded on.

[0077] It should be noted that, when not considering simultaneous construction, or when only considering the construction of a jacket foundation of one specification, each pile planting station 105 can be directly set on the hull platform 100.

[0078] In a specific embodiment of this application, each pile planting station 105 is equipped with a corresponding rock-socketing drilling rig 400. That is, the number of rock-socketing drilling rigs 400 is the same as the number of pile planting stations 105, allowing each pile planting station 105 to simultaneously perform rock-socketing drilling. Alternatively, only one rock-socketing drilling rig 400 can be deployed, ensuring that only one pile planting station 105 can perform rock-socketing drilling, while other pile planting stations 105 can perform other construction steps. By having each pile planting station 105 perform different construction steps, the problem of insufficient construction equipment can be avoided.

[0079] like Figure 3 As shown, each pile planting station 105 is equipped with a drill bit placement area 101 and a counterweight placement area 102. The drill bit placement area 101 is used to place the drill bit used by the rock-socketed drilling rig 400, and the counterweight placement area 102 is used to place counterweight devices of various weight specifications. The drill bit placement area 101 and the counterweight placement area 102 can be arranged adjacent to the corresponding pile planting station 105 so that the drill bit and counterweight devices can be easily retrieved and placed during construction.

[0080] The counterweight device is used to apply pressure to the rock-embedded drilling rig 400 during rock-embedded drilling operations. During operation, hoisting equipment is needed to lift the rock-embedded drilling rig 400 above the casing. The drill rod and drill bit of the rock-embedded drilling rig 400 extend into the casing to drill into the seabed rock strata. To enable the rock-embedded drilling rig 400 to drill downwards, a counterweight is placed on it to apply downward pressure, allowing the drill bit to drill downwards and increasing the drilling depth. Because the hardness of the rock strata varies, the required pressure also varies. Multiple counterweights of different weights can be placed in the counterweight placement area 102 to provide corresponding pressure to the rock-embedded drilling rig 400. Alternatively, multiple counterweights can be applied to the rock-embedded drilling rig 400 simultaneously to increase its weight.

[0081] The drill bit placement area 101 can also hold multiple drill bits of different specifications, so that the appropriate drill bit can be selected according to the size of the rock-socketed borehole to be constructed.

[0082] In one specific embodiment of this application, each pile planting station 105 is provided with a corresponding drill rod placement area 103, which is used to place the drill rod device used by the rock-embedded drilling machine 400. As the drilling depth gradually increases, the length of the drill rod needs to be increased, at which point an additional drill rod needs to be installed. The drill rod placement area 103 is provided around each pile planting station 105 to facilitate easy gripping when installing the drill rod.

[0083] Each drill rod placement area 103 contains drill rod devices including at least two different lengths of weighted drill rods. That is, each pile planting station 105 corresponds to a drill rod placement area 103 containing at least two different lengths of weighted drill rods. Each drill rod placement area 103 also includes at least one length of drill rod, meaning each pile planting station 105 corresponds to a drill rod placement area 103 containing at least one length of drill rod. Those skilled in the art will understand that drill rod devices are divided into three categories: square drill rods, drill rods, and weighted drill rods. This embodiment does not elaborate on the structural differences between these three types of drill rods.

[0084] It should be noted that multiple heavy-duty drill rods and drill pipes of the same length can be installed to facilitate the addition of multiple heavy-duty drill rods and drill pipes as the drilling depth increases.

[0085] In a specific embodiment of this application, each pile driving station 105 is equipped with an air compressor 106 and a settling tank 104. The air compressor 106 is used to inject compressed air (such as...) into the rock-embedded hole 800 through the drill rod device of the rock-embedded drilling rig 400. Figure 9 As shown, the principle of discharging mud and rock cuttings through the drill pipe device is the air lift reverse circulation principle. Since the air lift reverse circulation principle is existing technology, it will not be described in this embodiment.

[0086] The settling tank 104 is used to store the mud and rock cuttings discharged from the drill pipe device. That is, the mud and rock cuttings discharged through the air lift reverse circulation principle can be stored in the settling tank 104 to prevent them from being discharged into the sea and polluting the marine environment.

[0087] Furthermore, each pile driving station 105 is equipped with a generator 107 to power the air compressor 106, and a fuel storage tank 108 for storing fuel for the generator 107. It should be noted that the generator 107, in addition to powering the air compressor 106, can also power other electrical equipment on the self-elevating rock-embedded platform. Alternatively, a battery can be installed to store the electrical energy generated by the generator 107. The generator 107 is a fuel-powered generator capable of generating electricity by burning fuels such as diesel and gasoline. The fuel storage tank 108 is used to store fuel, ensuring the continuous power generation of the generator 107.

[0088] The rock-embedded construction process disclosed in this application can utilize the self-elevating rock-embedded platform disclosed in the above embodiments. The rock-embedded construction process may include: a construction state switching step, a casing insertion step, a rock-embedded drilling step, a pile planting step, a grouting step, and a casing cutting step.

[0089] like Figure 4 and Figure 5 As shown, Figure 4 and Figure 5 The construction status switching steps were demonstrated, specifically the process of raising the hull platform 100 above the water.

[0090] The self-elevating rock-embedded platform is moved to the construction location, and then the lifting legs 300 are driven to descend, so that the lifting legs 300 are inserted below the mud surface of the seabed. The lifting legs 300 support the hull platform 100, so that the hull platform 100 is above the water, thereby reducing the impact of the waves on the hull platform 100, improving the stability of the hull platform 100, and ensuring the construction quality.

[0091] like Figures 6-8 As shown, Figure 6 , Figure 7 and Figure 8 The process of inserting the casing is demonstrated, which is the process of inserting the casing 600 into the seabed rock layer from the pile planting station 105.

[0092] The casing 600 is lifted by hoisting equipment and aligned with the sleeve on the corresponding pile planting position 105, so that the casing 600 is inserted into the sleeve of the pile planting position 105. Under the action of gravity, the bottom of the casing 600 will be inserted below the mud surface. If the upper rock layer is relatively loose, it will also be inserted into the rock layer to a certain depth under the action of gravity, but the insertion depth is limited and the stability is insufficient.

[0093] The hoisting equipment lifts the hydraulic hammer or vibratory hammer 700 to the top of the casing 600. The vibration force output by the hydraulic hammer or vibratory hammer 700 further lowers the casing 600, increasing its insertion depth into the rock layer and improving its stability. It should be noted that the top of the casing 600 must be above the water surface, and the depth of insertion into the rock layer must be sufficient to prevent seawater from entering from the bottom, ensuring isolation between the casing 600 and the seawater and facilitating subsequent airlift reverse circulation.

[0094] like Figure 9 As shown, Figure 9 The rock-embedded drilling steps are demonstrated, specifically the drilling process of the rock-embedded drilling rig 400.

[0095] The rock-embedded drilling rig 400 is hoisted above the casing 600 using hoisting equipment, and the drill bit of the rock-embedded drilling rig 400 is inserted into the casing 600 to drill downwards, obtaining a rock-embedded hole 800. The depth of the rock-embedded hole 800 is selected according to the requirements of the construction process.

[0096] like Figure 10 As shown, Figure 10 The steps for planting the stakes were demonstrated;

[0097] The steel pipe pile 900 is lifted using hoisting equipment and inserted into the rock-socketed hole 800 through the casing 600. It should be noted that after the steel pipe pile 900 is inserted into the rock-socketed hole 800, its top remains below the water surface.

[0098] like Figure 11 As shown, Figure 11 The grouting process was demonstrated;

[0099] Grouting is injected into the casing 600. The injected grout is generally cement grout. The grout flows downward through the casing 600 and fills the space between the steel pipe pile 900 and the borehole wall of the rock-embedded hole 800, thus forming a grouting layer between the steel pipe pile 900, the borehole wall of the rock-embedded hole 800, and the inner wall of the casing 600. The grouting layer connects the steel pipe pile 900 and the borehole wall of the rock-embedded hole 800, improving the stability of the steel pipe pile 900 within the rock-embedded hole 800 and ensuring the stability of the steel pipe pile 900.

[0100] Casing removal procedure: Cut off the portion of the casing 600 exposed above the water surface. Since the casing 600 and the steel pipe pile 900 are connected as a single unit by the grouting layer after grouting, the casing 600 cannot be removed directly. Therefore, it can be cut off. When cutting off the casing 600, the distance between the steel pipe pile 900 and the water surface can be considered; even without removing it, a portion of the steel pipe pile 900 will still be cut off.

[0101] In summary, the self-elevating rock-embedded platform disclosed in this application has the following advantages:

[0102] 1. No floating crane equipment is required for hoisting; it can be moved independently.

[0103] 2. No transport ship is needed to place the platform during relocation; it can be floated autonomously.

[0104] 3. For long-distance towing, there is no need for transport ships; it can be floated independently and towed by tugboats.

[0105] 4. The self-elevating rock-embedded platform has a larger variable load and construction space than the ordinary rock-embedded platform, and can simultaneously deploy three rock-embedded drilling rigs, making its construction efficiency 2-3 times that of ordinary rock-embedded equipment.

[0106] 5. The hoisting equipment on the self-elevating rock-embedded platform can be used for the hoisting of steel pipe piles without the need for a separate floating crane. The self-elevating rock-embedded platform itself has all the functions required for rock-embedded construction.

[0107] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0108] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0109] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0110] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A self-elevating rock-embedded platform, characterized in that, include: The hull platform (100) is provided with multiple pile planting stations (105). The lifting leg (300) is set on the hull platform (100) and can perform lifting and lowering actions to drive the hull platform (100) to switch between the displacement state and the construction state. When the hull platform (100) is in the displacement state, it floats on the water. When the hull platform (100) is in the construction state, it is located on the upper side of the water. A rock-embedded drilling rig (400) is installed on the hull platform (100) for rock-embedded construction at the pile planting position (105); The hoisting equipment is installed on the hull platform (100).

2. The self-elevating rock-embedded platform as described in claim 1, characterized in that, The number of pile planting stations (105) is at least three, and the number of piles is the same as the number of the foundation piles of the jacket foundation to be constructed. The positional relationship of each of the pile planting positions (105) is the same as the positional relationship of each pile foundation of the jacket foundation to be constructed.

3. The self-elevating rock-embedded platform as described in claim 2, characterized in that, One of the pile-planting stations (105) is directly set on the hull platform (100), while the other pile-planting stations (105) are set on the side of the hull platform (100) by means of a support device; or, Each of the aforementioned pile-planting stations (105) is directly set on the hull platform (100).

4. The self-elevating rock-embedded platform as described in claim 2, characterized in that, Each of the aforementioned pile planting stations (105) is equipped with a corresponding rock-embedded drilling rig (400).

5. The self-elevating rock-embedded platform as described in claim 2, characterized in that, Each of the aforementioned pile planting stations (105) is provided with a drill bit placement area (101) and a counterweight placement area (102). The drill bit placement area (101) is used to place the drill bits used by the rock-embedded drilling rig (400); The counterweight placement area (102) is used to place counterweight devices of various weight specifications. The counterweight devices are used to apply pressure to the rock-embedded drilling rig (400) during rock-embedded construction.

6. The self-elevating rock-embedded platform as described in claim 2, characterized in that, Each of the aforementioned pile planting stations (105) is provided with a corresponding drill rod placement area (103); The drill rod placement area (103) is used to place the drill rod device used by the rock-embedded drilling rig (400).

7. The self-elevating rock-embedded platform as described in claim 6, characterized in that, Each drill rod placement area (103) contains a drill rod device that includes at least two different length specifications of weighted drill rods; The drill pipe devices placed in each of the drill pipe placement areas (103) also include drill pipes of at least one length specification.

8. The self-elevating rock-embedded platform as described in claim 2, characterized in that, Each of the aforementioned pile-planting stations (105) is equipped with: An air compressor (106) is used to inject compressed air into the rock-embedded hole (800) through the drill rod assembly of the rock-embedded drill (400) to discharge mud and rock cuttings through the drill rod assembly; Settling tank (104) is used to store mud and rock cuttings discharged from the drill pipe assembly.

9. The self-elevating rock-embedded platform as described in claim 8, characterized in that, Each of the pile planting stations (105) is provided with a generator (107) that supplies power to the air compressor (106) and a fuel storage tank (108) for storing fuel for the generator (107).

10. The self-elevating rock-embedded platform as described in any one of claims 1-9, characterized in that, The lifting equipment includes a main crane (200) and an auxiliary crane (500), wherein the lifting weight of the main crane (200) is greater than that of the auxiliary crane (500).

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